Amazon has the Mr. Beams MB982 Battery-Operated Indoor/Outdoor Motion-Sensing LED Ceiling Light 2-pack in White on sale for $35.99 + FREE shipping!

Why this deal is hot:
Save 49% off -- that's $12.25 in savings!

What this does and why you need it:
These motion sensors have auto shut-off, require no wires and can be attached anywhere. After thirty seconds with no detected motion, the lights will turn off and they have a range of up to 25 feet. The included durable, energy-efficient LED light never needs replacing and you can get more than 3,200 activations on one set of batteries! These motion sensors do require 8 C batteries (4 batteries a piece). This set comes with 2 motion sensors, 2 mounting plates, 4 screws, 4 mounting anchors and a user manual.